HT814D0 데이터 시트보기 (PDF) - Holtek Semiconductor
부품명
상세내역
제조사
HT814D0 Datasheet PDF : 15 Pages
| |||
· 6Hz/6HzB flash
When voices are playing, the FLAG1 pin
outputs a 6Hz signal to drive an LED. The
signal is active low, 25% duty. Once the voice
output is terminated, the FLAG1 pin be-
comes a floating output. When the FLAG1
and the FLAG2 pins are optioned as 6HzB
and 6Hz outputs, they will be alternately
output at a 6Hz rate.
AUD
FLA G
: F lo a tin g
· Busy output
When a voice group is playing, the outputs of
both FLAG1 and FLAG2 are turned low, indi-
cating that the chip is busy.
AUD
FLA G
: F lo a tin g
In addition to the above-stated output sig-
nals, FLAG1 can also generate one of the fol-
lowing signals by code option:
¨ Voice indicator output
FLAG1 is active low when voices are play-
ing. FLAG1 is also turned low when a voice
section is output. The brightness of FLAG1
varies with the volume. FLAG1 becomes a
floating output after the silence section is
output or the voice output is terminated.
AUD
FLA G
HT814D0
¨ End-pulse output
When the voice output is completed, the
FLAG1 pin outputs an active low pulse. The
pulse width can be programmed depending
on the customer¢s requirements.
The FLAG1 as well as FLAG2 pins are both
floating outputs when the chip is in the
standby state.
AUD
FLA G
: F lo a tin g
Volume control
The function of the volume control can be set by
mask option. A code is written in the function
table for the purpose of controlling the volume
of each section output after the volume control
function is chosen. There are two volume op-
tions, namely, full range and half range.
AUD
The AUD pin is a PMOS open drain structure.
It outputs voice signals to drive a speaker
through an external NPN transistor when the
chip is active. However, the AUD pin becomes a
floating output when the chip is in the standby
state.
The 8050 type transistor with hFE@150 is rec-
ommended for an output driver.
O SC1 VDD
R O SC
O SC2 AUD
VSS
H T814D 0
V DD
SPK
8050
: F lo a tin g
10
March 15, 2000
Share Link: 